Mole Day!!

Today is a joyous day of celebration in the chemistry world, as we celebrate the mole. On this day, specifically at 2 minutes and 20 seconds after 6 am, we recognize the value of the mole (over $4500 in gold as of this morning).

So, let the celebration begin –

1) determine the actual masses needed make our celebratory solution

2) following directions, make said solution

3) enjoy celebratory solution while answering the following questions –

Mole Practice Questions

1. Why is this day, and time, recognized as mole day?

2. How many moles of water are in an 8 oz. glass of water?

128 oz = 1 gal.; 1 gal = 3.79 L; 1 L = 1 kg.

3. If the price of gold this morning was $24428.13 / kg, what is the actual value of one mole of gold?

4. The mass of a penny is 2.471 g. If pennies were made of pure copper, how many pennies are needed to make a mole of copper?

5. Extra Credit (due by Friday)

A. How many moles are in one gallon of gasoline?

The molecular formula for gasoline is CH. The density is 0.85 g/mL.

B. What is the average molar mass of the air we breathe?

Air is 78 % nitrogen and 22 % oxygen for this example.

C. If the average breath is 2.5 L, how many moles of air are in one breathe?

1 mole of gas occupies 22.4 L